Method of producing semi-hard magnetic materials with a plurality of heating and cooling steps

ABSTRACT

A METHOD OF PRODUCING CHEAP, MASS-PRODUCIBLE, AND MACHINE WORKABLE SEMI-HARD MAGNETIC MATERIALS HAVING GOOD MAGNETIC PROPERTIES MERELY BY CASTING AND HEAT-TREATING WITHOUT COLD WORKING, WHICH COMPRISES, AFTER A SOLUTION TREATMENT, A PLURALITY OF REPETITIVE STEPS OF HEATING AND COOLING AN ALLOY CONTAINING A PLUTALITY OF KINDS OF AND REQUIRED QUANTITIES OF INEXPENSIVE COMPONENTS AT A TEMPERATURES BELOW THE CURIE TEMPERATURE, EACH OF THE HEATING TEMPERATURES IN SAID STEPS BEING HIGHER THAN THE HEATING TEMPERATURE OF THE PRECEDING STEP. THE MAIN CONTENTS OF THE ALLOY ARE FE, MN, CU AND TI.

1974 TADAO TOKUSHIMA 3,733,041

METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH-A PLURALITY OF HEATING AND COOLING STEPS Original Filed July 28, 1969 24 Sheets-Sheet l B I WD/m MAT/m) FIG. 2

l 1 l I 14000 l2000 |0000 8000 6000 4000 2000 H(AT/m) 1974 TADAO TOKUSHIMA 3,

METHOD OF PRODUCING SEMI'HARD MAGNETIC MATERIALS WITHA PLURALITY OF HEATING AND COOLING STEPS Original Filed July 28, 1969 24 Sheets-Sheet 2 B (Wis/m I.O T

FIG. 3

l l l 10000 8000 6000 4000 2000 H AT/ m) b FIG. 4 EX H (AT/ m) TADAO TOKUSHIMA 3,733,041

METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND COOLING STEPS Original Filed July 28, 1969 24 Sheets-Sheet 3 FIG. 5 5

l I l 8000 6000 4000 2000 H( AT/ m) (Wb/m 0.8

H( AT m 1974 TADAO TOKUSHIMA 3,

METHOD 01 PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A PLURAIJITY OF HEATING AND COOLING STEPS Original Filed July 28, 1969 24 Sheets-Sheet l FIG. 7

MAT/m) Wb/ FIG. 8 6.0 m)

I I I I 12000 0000 8000 6000 4000 2000 /7( AT/m) 1974 TADAO TOKUSHIMA 3,783,041

METHOD OI" PRODUCING SEMLHARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND COOLING STEPS Original Filed July 28, 1969 24 Sheets-Sheet 5 I l l |0000 8000 6000 4000 2000 H AT/ m) MAT/m) Jan. 1974 TADAO TOKUSHIMA 3,

METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND COOLING STEPS Original Filed July 28, 1969 24 SheetsSheet 6 FIG. 5

(Wb/m L0 1 H(AT/m) I l l 8000 6000 4000 2000 H AT/m) 1974 TADAO TOKUSHIMA 3,783,041

METHOD OI" PRODUCING SEMIHARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATINGAND COOLING STEPS Original Filed July 28, 1969 24 Sheet.s-'-Sheet 7 FIG. l3 fig 2 H(AT/m) FIG. l4

H(AT/m) 1974 TADAO TOKUSHIMA 3,

METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND COOLING STEPS Original Filed July 28, 1969 24 Sheets-Sheet 8 FIG. I5 34 H(AT/m) 5 FIG. l6 g 1974 TADAO TOKUSHIMA 3,783,041

METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND COOLING STEPS Original Filed July 28, 1969 24 Sheets-Sheet a FIG. I?

MAT/m) FIG. I8 2Y5 m2) L l I I I 12000 10000 8000 6000 4000 2000 /-/(AT/ m) 1974 TADAO TOKUSHIMA 3,783,041

METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A I PLURALITY OF HEATING AND COOLING STEPS Original Flled July 28, 1969 24 Sheets-Sheet 10 FIG l9 Va/m2) |.O T

l l I |2000 10000 8000 6000 4000 2000 H AT/ m) FIG. 24

l l I I 10000 8000 6000 4000 2000 H(AT/m) 1974 TADAO TOKUSHIMA 3,733,0

METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A PLURALITY 0F HEATING AND COOLING STEPS Original Filed July 28, 1969 24 Sheets-Sheet 11 FIG. 20

A-AB|" MO Ge Sn Z'r Nb B T e W A l b MOP ADDITIVES 1974 TADAO TOKUSHIMA 3,783,041

METHOD OF PRODUCING SEMlHARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND COULTNG STEPS Original Filed July 28, 1969 I 24 Sheets-Sheet 12 FIG.2I

MAXIMUM CUTTING SPEED CUTTING SPEEDIm/min) (II O l l I I I I I I I RE Ge Sn Zr Nb 8 Te W S Pb ADDITIVES 3 111974 I TADAO TOKUSHIMA 3 5 METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND COOLING STEPS Original Filed July 28, 1969 I 24 Sheets-Sheet 15 0, PERCENTAGE OF SAMPLES WITH 50 BLOWHOLES O I I I I NO T \|l-gGeSnZF Nb B Te W S Pb AL MO 'ADDITIVES B (W b/m 0.8

* /-/(AT/m) 1, 1974 TADAO TOKUSHIMA 3,783,041

METHOD OF PRODUCING SEMl-HARD MAGNETIC MATERIALS WITH A PLURALITY- OF HEATING AND COOLTNG STEPS Original Filed July 28, 1969 24 Sheets-Sheet 14 FIG.25

LL] 0 Q: (C) D 550C'lh @500 Q: 400C'5h LU Q. E LL| l TIMEU'I) L11 0 4 c) E 500 a 400Clh LL| [1. 2 DJ l.-

1974 TADAO TOKUSHIMA 3,

METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND CQOLING STEPS Original Filed July 28, 1969 24 Sheets-Sheet 15 FIGZT H(AT/m) f' LO T l l I l 1 I |6000 [4000 12000 l0000 8000 6000 4000 2000 H(AT/m) Jan. 1974 TADAO TOKUSHIMA 3,733,041

METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND COOLING STEPS Original Filed July 28, 1969 I 24 Sheets-Sheet 16 FIG. 29

HYSTERESIS LOOPS Jan. 1, 1974 0 riginal TEMPER%TURE(C) o o METHOD OF PRODUCING SEMI-HARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND COOLING STEPS Filed July 28, 1969 FIGBO 24 Sheets-Sheet 1 7 1 6 a: 2, z w 2 2% Mug. l 5oo- P Lu 2 CL no E a 2 O l l I 50 I00 TlME(rnin) Mag.

"PIVIAGNETIZATION RATE J n 1974 TADAO TOKUSHIMA 3,733,041

METHOD OF PRODUCING SEMl'HARD MAGNETIC MATERIALS WITH A PLURALITY OF HEATING AND COOLING STEPS Omglnal Flled July 28, 1969 24 Sheets-Sheet 18 FIG. 32 v l I l I l I 12000 |0000 8000 6000 4000 2000 H(AT/m) FIG. 33(0) (Win/m 0.8

l Q l I I r2000 |0000 8000 6000 4000 2000 H AT/ m) Jan. 1, 1974 METHOD 01- PHODUUlNL PLUHALITY OP HEATING Original Filed July 28, 1969 MOTOR SPEED(r/min) MOTOR sPEEmr/mm TADAO TOKUSHIMA 3,783,041 SEMI HARD MAGNETIC- MATlzIHlAbS WITH A AND COOLING STEPS 24 Sheets-Sheet l9 FlG.33(b) BDT= 550 BDT 530 ALNICO ALLOY 160 260 300 460 550 TORQUE (g Cm) FIG. 33(c) 4P-5OHZIOOV25 F ALNICO ALLOY 260 400 660 TORQUE(g-Cm) 1974 TADAO TOKUSHIMA 3,733,041

METHOD OI" I'HUDUUING SlU'Ml'H/HH) MAGNETIC MA'I'I'IIUA IIS WITH A ILURALITY HEATING AND COOLING STEPS Original Filed July 28, 1969 24 Sheets-Sheet FIG. 33(d) E g 600 ALNICO ALLOY 5 LL! Hi (I) F. O 2 2oo TORQUE(g'cm) FIG. 34(0) (d8) NOISE LEVEL ALNICO ALLOY Hz |00V2/J.F (8P) Frequency(Hz) INVENTION (dB) (EX.42) 3O EOHZIOOVZILLF (8P) 200 I000 5000 20000 -Frequency 

